Flanged bobbin with protected edge



1950 J. J. BLISS FLANGED BOBBIN WI'TH PROTECTEi) EDGE 2 Sheets-Sheet 1Filed June 3, 1949 FIG.2.

INVENTOR.

JEROME :r. BLISS ATTORNEYS Oct. 31, 1950 J. J. BLISS FLANGED BOBBIN WITHPROTECTED EDGE Filed June 3, 1949 2 Sheets-Sheet 2 w UE INVENTOR. JEROMEJ' BUSS BY M ATTORNEYS Patented Oct. 31, 1950 UNITED STATES PATENTOFFICE FLAN GED BOBBIN WITH PROTECTED EDGE Application June 3, 1949,Serial No. 96,849

16 Claims.

This invention relates to bobbins, spools, or drums hereinaftergenerally classified as bobbins, on which textile thread or wire may bewound.

The usual textile bobbin now employed includes a central wooden barrelon which the thread is wound and separate end flanges formed of fiberand attached to the outer ends of the barrel. A great many difficultiesare experienced in the use of such bobbins. On many of these bobbins thethread is wound under high tension and in many instances the threadafter bein twisted and wound on the bobbin is wetted in order to set thetwist of the thread and as the thread dries it shrinks and exertstremendous pressure not only on the barrel of the bobbin but endwiseagainst the flanges of the bobbin. The wooden barrel due to the highpressure exerted on it, although originally accurately cylindricallyformed, is not strong enough to resist the strain and often quicklybecomes misshapen and must be discarded for the reason that it will notrun true and in proper balance at high speed when so misshapen and theroughness of the barrel, due to the imperfections in the shape thereof,often results in the tearing or cutting of strands of thread woundthereon. Also, due to the end pressure exerted on the fiber bobbinflanges which are separate from the barrel these flanges tend to bowoutwardly and separate from the barrel, thereby producing crevices orcracks between the ends of the barrel and the flanges within whichthread may be caught to become frayed or torn during the winding orunwinding operation. The bowing out of the bobbin flanges also tends tocause the bobbin to run imperfectly as it is being rotated.

If, to give the bobbin adequate strength and to prevent the formation ofthread catching cracks between the barrel and the end flanges there issubstituted for the usual wooden barrel bobbin equipped with separatefiber end flanges a metal bobbin wherein a metal barrel and metal endflanges are employed, other difficulties result. In drawing off thethread from the bobbin the thread is often drawn off from one end of thebobbin and the thread thus rides against the peripheral edge of the endflange and if this end flange is nicked, marred, dented or cut so as tobe otherwise than perfectly smooth, strands of the thread are liable tocatch on the roughened portion of the end flange, causing the tearing ofone or more strands of the thread. If bobbins having unprotected metalend flanges are provided these end flanges are subject to rapiddeterioration through nicking, marring, denting or cutting during thehandling of the bobbins. and

thus bobbins having unprotected end flangesintegral with the barrelportions are not a solution to the bobbin problem.

There is a disadvantage in employing cast bobbins made of metal orplastic due to inaccuracies that will result in the barrel and flangesin such cast bobbins. Also, if such cast bobbins are made from syntheticresins or other plastics, they do not have sufficient strength to resistthe tremendous pressure to which the bobbins are subjected by the threadwound thereon. If the bobbins are made from the heavier metals, there isa disadvantage in their use inasmuch as many of these bobbins must berotated at very high speeds and in bringing the bobbins up to speedthere is a decided disadvantage in a heavy bobbin. Also, slightinaccuracies in the formation of the bobbin when made of heavy materialgive rise to difficulties in maintaining the bobbin in proper balance athigh speeds to a greater extent than is the case when lighter bobbinsare employed.

It is the object of the present invention to pro,- vide a novel andimproved bobbin of cheap and simple construction which will eliminateall the difficulties heretofore experienced with other bobbins and abovereferred to.

More specifically, it is an object of the invention to provide a lightweight exceedingly strong bobbin including a metallic member forming abarrel portion and a metallic flange at the outer end of the barrelportion and a head formed of synthetic resin, fiber or analogousnon-meta1lic material and capable of being formed to provide a smoothperipheral edge which cannot be readily nicked, marred, or dented, thesaid head being recessed to receive the metallic flange and having anouter circumferential portion overlying the metallic flange, the innerside of the said circumferential portion lying flush with the inner sideof the flange.

It is a further object to provide such a bobbin wherein the flange isattached to the head by means of an adhesive, and in particular,adhesive formed of synthetic resins.

The objects and advantages of the invention will more fully appear fromthe following description made in connection with the accompanyingdrawings wherein like reference characters refer to the same or similarparts throughout the different views, and in which Fig. 1 is a view infront elevation of a bobbin embodying the invention;

Fig. 2 is a view in end elevation looking toward the bottom end of thebobbin shown in Fig. 3 .is a vertical section taken through the 3 bobbinsubstantially on the line 33 of Fig. 2 as indicated by the arrows;

Fig. 4 is a horizontal section taken on the line 4-4 of Fig. 3 asindicated by the arrows;

Fig. 5 is a View in front elevation of a slightly difierent type ofbobbin embodying the invention;

Fig. 6 is a view in end elevation of the bobbin shown in Fig. 5

Fig. 7 is a vertical section taken on the line of Fig. 6 as indicated bythe arrows;

Fig. 8 is a vertical section taken on the line 88 of Fig. '7 asindicated by the arrows; and

Fig. 9 is a vertical section taken through one of the Nylon plasticgudgeons as it will appear before being mounted in one of the heads ofthe bobbins shown in Figs. 5 to 8.

Referring first to the bobbin shown in Figs. 1 to 4, this bobbincomprises two metal drum members A, two heads B and C formed ofnon-metallic plastic or fiber material and a joining collar D which maybe formed of metal, plastic, fiber or other material.

Each drum member A is preferably a stamping formed of aluminum sheetmetal or an aluminum alloy of light weight, yet having great strength.Each drum member is accurately shaped to form an inner tubular barrel Hand an outer circular flange l I which is integral with the barrel ID inthe embodiment shown, concentric therewith and projects radially fromthe outer end of the barrel well beyond the barrel.

Each head B and C is formed of a tough, strong, shock resistant plasticor fiber of such a type that the peripheral edge of the head can besmoothly shaped and will be non-brittle and will have sufli'cientinherent resiliency that it cannot be readily nicked, marred, dented orcut through rough handling. Such materials as plastic, Nylon, certain ofthe synthetic resins and laminated cloth fiber such as employed in themaking of fiber gears are typical of those that 'can be used in formingthe heads B and C. The

two heads B and C each have a central cylindrical portion H which snuglyfits within the outer part of one of the barrel portions I to strengthenand support the outer part of the barrel portion. Also, each head B andC outwardly from its cylindrical portion I2 is provided with a recess l3at its inner side shaped to snugly receive one of the flanges ll.outwardly from the recess l3 each head B and C forms an outercircumferential portion 14 which overlies the outer edge of one of theflanges l i. The inner side of each circumferential portion [4 liesflush with the inner side of the flange H received within the recess I3of the head on which the circumferential portion 14 is formed. Theperipheral exterior edge of each circumferent'al portion M is verysmoothly formed and preferably rounded as shown so as to permit thetravel of thread thereover without catching any of the strands of thethread.

The two heads B and C are secured to the respective drum members A andfor this purpose an adhesive l may be employed. The adhesive used ispreferably a synthetic resin such as has been recently developed forbonding together a metal part and another part made of metal or othersubstance and which will have great strength when set. The adhesive isemployed not only between the outer part of the barrel ID of the drummember A and the cylindrical portion I2 of the particular head securedtherein, but it is also employed between the flange l l and the adjacentrecessed portion of the head receiving the flange. Actually, therecesses 13 are made purposely slightly deeper than necessary toproperly receive the flanges l I so that irrespective of slightimperfections in the manufacture of the heads B and C or in thethickness of the flanges H as the drum members A are drawn from sheetmetal the inner surfaces of the circumferential portions M of the headsmay be brought exactly flush with the inner surfaces of the flanges ll.Sufficient adhesive [5 is employed between the flanges II and therecessed portions of the heads to completely fill the space between theflanges and the heads and to assure a thorough bonding action.

One of the heads, such as the head B, will be provided at its centralportion with a spindle receiving aperture [6 which may join radialdriving key receiving recesses 11 formed at the outer side of the head.The other head C may be equipped with a central opening l8 which iscountersunk at its inner side at 180. to permit easy insertiontherethrough of a spindle. It will be appreciated that if desired thetwo heads may be otherwise centrally formed to permit mounting of thebobbin on a spindle and to permit the bobbin to be driven if this isdesired.

Preferably, the heads B and C are assembled with the drum members Abefore the two barrels of the drum members A are joined together. Afterthe stampings and heads have been so assembled the two barrels 10 may bejoined in alignment by means of a collar D having a central outwardlyprojecting flange IS on its outer surface which will be disposed betweenthe inner ends of the two barrels I 0, whereby the collar serves toalign the two barrels as the inner ends of the same are broughttogether. The collar D may be bonded to the inner ends of the two barrelportions ID by an adhesive 20 such as described in securing the heads Band C to the stampings A or, if desired, the collar D may be secured tothe barrel portions ID in any other suitable manner, as by welding ifmade of metal or the like. When joined together one barrel forms acontinuation of the other to form a winding core.

The bobbin produced as above described can be employed for the windingof textile thread or fine wire thereon. The barrels l0 being metal willhave tremendous strength to prevent the same from being crushed. ormisshaped due to the pressure applied thereto by the thread or wire. Asthe flanges H are made integral with the barrels I0 it will beimpossible for the flanges H to draw away from the barrels I 0 underendwise thrust exerted by the thread on the bobbin. Therefore, cracks orcrevices cannot develop for the catching of thread between the flanges Hand the barrels l6. Also, the heads B and C act to reinforce the flangesl l and the flanges act to reinforce the heads, making the end.structures of the bobbin exceedingl strong to resist end thrust andpreventing the flanges H from being warped or bent out of a true planeextending at right angles to the axis of rotation of the bobbin. Themetal flanges H, being somewhat resilient, act to reinforce the heads Band C so that if the bobbin is dropped as on a metal or concrete floordeflection of the circumferential portions M of the heads will not besuihcient due to the backing of the flanges H as to permit cracking orbreakage of the heads B and C or portions thereof. Due to the fact thatthe circumferential portions M of the heads overlie the edges of theflanges II and due to the fact that the inner sides of thecircumferential portions l 4 are flush with the inner sides of theflanges II, the thread wound on the bobbin can be very easily drawn offthe bobbin from one end of the same. By reason of the fact that theheads B and C are made of tough, strong and resilient non-metallicplastic or fiber the peripheral edges over which the threads run cannotbe nicked, marred, or dented through handling so as to cause catching ofstrands of the thread as the thread runs over the circumferentialportions M of the heads. In other words, the peripheral portions of theheads B and C are made true and smooth and the type of material employedfor the heads is such that as the periphery of one of the heads isstruck during rough handling of the bobbin the material is tough enoughand resilient enough that it is almost impossible to nick-mar, dent orcut it as would be the case if a metal head were employed.

Referring now to Figs. 5, 6, '7, and 8, there is there shown a slightlydifferent embodiment of the invention. The parts of this bobbin includemetal drum members E, heads F, gudgeons G, a tubular strut H extendingbetween the two gudgeons, and a collar I for joining together the innerends of the stampings E.

The stampings E are similar to stampings A previously described, andinclude barrels 2| of tubular formation and circular flanges 22 whichmay be integrally formed with the barrels at the outer ends thereof andprojecting radially therefrom in planes normal to the axis of rotationof the bobbin. The heads F are made of tough plastic or fiber as in thecase of the heads B and C and each head is provided with a recess 23 atits inner side to receive one of the flanges 22 and it is furtherprovided with a circumferential portion 24 overlying the edge of theadjacent flange 22 and having its inner surface flush with the innersurface of the flange 22. The peripheral edges of the heads F are smoothand rounded as in the case of the previously described construction.Each head has an inner flange 25 received within the outer part of thebarrel 2| of the adjacent drum member E and, of course, the head closesthe outer end of the barrel. The barrel 2| of each stamping isadhesively bonded to the flange 25 of the adjacent head, while theflange 22 of the stamping is similarl bonded to the recessed portion ofthe adjacent head by an adhesive 26 formed preferably of syntheticresin.

Each head F is provided with a central gudgeon receiving opening 21 andthe outer portion of the head is outwardly grooved at 28 adjacent thisopening. The gudgeons G as stated are made of plastic Nylon and they areequipped with exterior shoulders 29 for abutment against the inner sidesof the heads F. The inner surfaces of the gudgeons are provided withrabbets 30 to receive the outer ends of the tube H. As a gudgeon isoriginally made, as shown in Fig. 9, it is provided with a roundedflange 3| intermediate the shoulder 29 and the outer end of the gudgeon,the diameter of this flange corresponding to the diameter of a groove 28in a head F. In assembling one of the gudgeons G on one of the heads Fthe gudgeon is forced through the opening 21 from the inner side of thehead, thereby causing the flange 3| of the gudgeon to compress and thenthe two barrels.

the making of the gudgeons G inasmuch as it is tough, strong, makes anideal high speed bearing for the spindle and yet it has the peculiarresilient quality allowing the compression of the flange 3| forinsertion in the opening 21 in the head F and expansion of the flangeinto the groove 28 after insertion to lock the gudgeon in place.material having like properties may be employed instead of plastic Nylonand it will be understood that when plastic Nylon is referred to it isused in a broad enough sense to embrace equivalent other plasticmaterials.

After the gudgeons G have been assembled with the heads F and thegudgeon equipped heads have been secured to the stampings E, to assembleto gether the parts forming a single bobbin the collar I is applied tothe inner end of one of the two barrels 2| with the central flange 32 ofthe collar bearing directly against the inner end of that barrel 2|.Thereupon the tube H which is formed preferably of metal is placed so asto be received within the rabbeted portion 39 of one of the gudgeons andthen the two barrels 2| of the two drum members E are brought intoalignment and forced toward each other so that the outer ends of thetube H are received within rabbets 3|! of the two gudgeons and the innerends of the two barrels 2| are received, one at either side of theflange 32 of the collar I.. Previous to this assembly the exteriorsurfaces of the collar I are coated with an adhesive material 33 formedpreferably of a synthetic resin and thus when this adhesive material hasset a strong bond will be made between the barrel portions 3| and thecollar I. The two gudgeons G and the tube H forms a continuous passagewithin which a spindle for the mounting of the bobbin may be received.The bobbin thus produced has the advantages of the bobbin previouslydescribed and illustrated in Figs. 1 to 4.

The two drum members A of the bobbin shown in Figs. 1 to 4, and the twodrum members E of the bobbin shown in Figs. 5 to 9 may be anodyzed priorto assembly to protect the surfaces thereof. When the drum members areanodyzed it is preferable to make the stepped collars D or I of somesuch plastic material as plastic Nylon, the outer edges of the flangesof which can be and are sanded or burnished off flush with the innerends of the barrels ID or 2| without machining of the parts. In caseswhen the drum members are not to be anodyzed the collars D and I may bemade of metal and the edges of the flanges may be machined off evenlywith the adjacent portions of collar acts to center the collar relativeto the two barrels While the inner ends of the two barrels are beingbrought together inaligned relation and the flange of the collar spansthe space between the two inner ends of the barrels and takes up forslight variations in thickness of these parts.

It will be seen that bobbins have been provided in accordance with thepresent invention which are inexpensive, light, strong and true andwhich will stand up under continuous use for a long period of time.

It will, of course, be understood that various changes may be made inthe form, details, arrangement and proportions of the various partswithout departure from the scope of the present invention which,generally stated, consists in the matter shown, and described, and setforth in the appended claims.

What I claim is: p

1. A flanged bobbin comprising a metal drum Other In any case the flangeof the member having an inner tubular barrel and an outer radiallyprojecting circular flange joining the outer end of said barrel, and acircular head formed of a tough, resilient non-metallic material havingthe property of being shaped to form a smooth edge incapable of beingreadily nicked, marred, dented or cut, said head being secured to saidflange at the outer side thereof and being recessed to snugly receivesaid flange, the circumferential portion of said head overlying the edgeof said flange and being of smooth exterior formation, the inner side ofthe circumferential portion of said head lying flush with the inner sideof said flange.

2. A flanged bobbin comprising a metal drum member having an innertubular barrel and an outer circular flange joining the outer end ofsaid barrel and projecting radially therefrom, and a circular headformed of a tough, resilient nonmetallic material having the property ofbeing shaped to form a smooth edge incapable of being readily nicked,marred, dented or cut, said head having a central cylindrical portionprojecting into the outer part of said barrel portion and securedthereto, said head being recessed to snugly receive said flange, thecircumferential portion of said head overlying the edge of said flangeand being of smooth exterior formation, the inner side of thecircumferential portion of said head lying flush with the inner side ofsaid flange.

3. A flanged bobbin comprising a metal drum member having an innertubular barrel and an outer circular flange joining the outer end ofsaid barrel and projecting radially therefrom, a

circular head formed of a tough, resilient nonmetallic material havingthe property of being shaped to form a smooth edge incapable of beingreadily nicked, marred, dented or out, said head at its inner side beingrecessed to snugly receive said flange, the circumferential portion ofsaid head overlying the edge of said flange and being of smooth exteriorformation, the inner side of the circumferential portion of said headlying flush with the inner side of said flange, and an adhesive bondingtogether said flange and said head.

4. The structure defined in claim 3, said head having a centralcylindrical portion received within the outer part of said barrel and anadhesive bonding together said central cylindrical portion and saidbarrel.

5. A flanged bobbin comprising a metal drum member having an innertubular barrel and an outer circular flange joinin the outer end of saidbarrel and projecting radially therefrom, a circular head formed of atough, resilient nonmetallic material having the property of beingshaped to form a smooth edge incapable of being readily nicked, marred,dented or out, said head at its inner side being recessed to snuglyreceive said flange, the circumferential portion of said head overlyingthe edge of said flange and being of smooth exterior formation, theinner side of the circumferential portion of said head lying flush withthe inner side of said flange, and an adhesive formed of synthetic resinbonding together said flange and said head.

6. The structure defined in claim 5, said head having a centralcylindrical portion received within the outer part of said barrel, andan adhesive of synthetic resin bonding together said central cylindricalportion and said barrel.

7. A flanged bobbin comprising a metal drum member having an innertubular barrel and an outer circular flange joining the outer end ofsaid barrel, a circular head formed of a tough, resilient non-metallicmaterial having the property of being shaped to form a smooth edgeincapable of being readily nicked, marred, dented, or out, said headbeing secured to said flange at the outer side thereof and beingrecessed to snugly receive said flange, the circumferential portion ofsaid head overlying the edge of said flange and bein of smooth exteriorformation, the inner side of the circumferential portion of said headlying flush with the inner side of said flange, a stepped collarattached to the inner end of said barrel and a tubular metal memberattached to said stepped collar in alignment with said barrel andforming a continuation thereof.

8. The structure defined in claim '7, and an adhesive bonding saidstepped collar to both said barrel and said tubular metal member.

9. The structure defined in claim 7 and an adhesive formed of syntheticresin bonding said stepped collar to said barrel and said tubular metalmember.

10. The structure defined in claim 7, the exterior surface of said metaldrum member and said tubular metal member being anodyzed and saidstepped collar being formed of a tough, nonmetallic material.

11. A flanged bobbin comprising a pair of metal drum members havinginner tubular barrels and outer projecting circular flanges joining theouter ends of said barrels, a pair of circular heads formed of tough,resilient non-metallic material having the property of being shaped toform a smooth edge incapable of being readily nicked, marred, dented orcut, said heads being secured respectively to said flanges at the outersides thereof and being recessed to snugl receive said flanges, thecircumferential portions of said heads overlying the edges of theflanges received therein and being of smooth exterior formation, theinner sides of the circumferential portions of said heads lying flushwith the inner sides of the flanges received therein, andmeans joiningtogether the inner ends of said barrels in alignment.

12. The structure defined in claim 11, said means comprising a collarhaving an exterior flange formed thereon midway of its length, the twoinner end portions of the barrels being received over said collar andthe extreme inner end edges of said barrels being in abutment with theflange of said collar.

13. A bobbin comprising a pair of drum members having tubular barrels,means for joining the inner ends of the tubular barrels in alignment, apair of heads secured to the outer ends of said barrels, said headshaving central stepped apertures therein and spindle receiving Nylongudgeons mounted in the stepped apertures of said heads, said gudgeonseach having an exterior shoulder abutting one side of one of said headsand an exterior flange spaced from the shoulder compressible to bedriven through one of the stepped apertures and received within the stepof the aperture to inerlock the gudgeons in place on the head.

14. A bobbin comprising a pair of drum members having tubular barrels,means for securing together the inner ends of said barrels in alignment,heads secured to the outer ends of said drum members, said heads havingstepped central apertures therein, Nylon gudgeons mounted in saidstepped apertures, said gudgeons having exterior shoulders bearingrespectively against the inner sides of said head and exterior flangespaced from said shoulders compressible to be forced through saidapertures and received within the steps thereof to interlock thegudgeons in place, the inner ends of said gudgeons being internallyrabbetted, and a tube extending centrally Within said barrels betweenthe two gudgeons and having its ends received within the said rabbets ofthe gudgeons.

15. A bobbin comprising a pair of metal barrels having outturned flangesat their outer ends,

means for securing together the inner ends of 10 said barrels in alignedrelation, and end heads of a tough, non-metallic material capable ofbeing formed to provide a smooth peripheral edge incapable of beingreadily nicked, marred, dented or cut, the circumferential portions ofsaid 15 heads overlying the edges of said flanges and the inner sides ofsaid circumferential portions 1ying flush with the inner surfaces ofsaid flanges, and means securing said heads to said flanges.

16. A bobbin comprising a metal barrel having 20 an outturned flange atone end and a head of a tough, non-metallic material capable of beingREFERENCES CITED The following references are of record in the file ofthis patent:

FOREIGN PATENTS Number Country Date 323,916 Corey Aug. 11, 18851,455,779 Brown May 22, 1923 1,857,599 Mack May 10, 1932 1,958,840 BakerMay 15, 1934

